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[K64F] Add mbed_mac_address implementation #550

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Merged
merged 1 commit into from
Oct 15, 2014
Merged

[K64F] Add mbed_mac_address implementation #550

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22 changes: 22 additions & 0 deletions ...rgets/hal/TARGET_Freescale/TARGET_KPSDK_MCUS/TARGET_MCU_K64F/TARGET_FRDM/mbed_overrides.c
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Original file line number Diff line number Diff line change
Expand Up @@ -30,3 +30,25 @@ void NMI_Handler(void)
gpio_t gpio;
gpio_init_in(&gpio, PTA4);
}

// Provide ethernet devices with a semi-unique MAC address from the UUID
void mbed_mac_address(char *mac)
{
// Fetch word 0
uint32_t word0 = *(uint32_t *)0x40048060;
// Fetch word 1
// we only want bottom 16 bits of word1 (MAC bits 32-47)
// and bit 9 forced to 1, bit 8 forced to 0
// Locally administered MAC, reduced conflicts
// http://en.wikipedia.org/wiki/MAC_address
uint32_t word1 = *(uint32_t *)0x4004805C;
word1 |= 0x00000200;
word1 &= 0x0000FEFF;

mac[0] = (word1 & 0x000000ff);
mac[1] = (word1 & 0x0000ff00) >> 8;
mac[2] = (word0 & 0xff000000) >> 24;
mac[3] = (word0 & 0x00ff0000) >> 16;
mac[4] = (word0 & 0x0000ff00) >> 8;
mac[5] = (word0 & 0x000000ff);
}